diff options
Diffstat (limited to 'js/src/tests/non262/Set/union.js')
-rw-r--r-- | js/src/tests/non262/Set/union.js | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/js/src/tests/non262/Set/union.js b/js/src/tests/non262/Set/union.js new file mode 100644 index 0000000000..0aef79822d --- /dev/null +++ b/js/src/tests/non262/Set/union.js @@ -0,0 +1,300 @@ +// |reftest| shell-option(--enable-new-set-methods) skip-if(!Set.prototype.union) + +assertEq(typeof Set.prototype.union, "function"); +assertDeepEq(Object.getOwnPropertyDescriptor(Set.prototype.union, "length"), { + value: 1, writable: false, enumerable: false, configurable: true, +}); +assertDeepEq(Object.getOwnPropertyDescriptor(Set.prototype.union, "name"), { + value: "union", writable: false, enumerable: false, configurable: true, +}); + +const emptySet = new Set(); +const emptySetLike = new SetLike(); +const emptyMap = new Map(); + +function asMap(values) { + return new Map(values.map(v => [v, v])); +} + +// Union of two empty sets is an empty set. +assertSetContainsExactOrderedItems(emptySet.union(emptySet), []); +assertSetContainsExactOrderedItems(emptySet.union(emptySetLike), []); +assertSetContainsExactOrderedItems(emptySet.union(emptyMap), []); + +// Test native Set, Set-like, and Map objects. +for (let values of [ + [], [1], [1, 2], [1, true, null, {}], +]) { + // Union with an empty set. + assertSetContainsExactOrderedItems(new Set(values).union(emptySet), values); + assertSetContainsExactOrderedItems(new Set(values).union(emptySetLike), values); + assertSetContainsExactOrderedItems(new Set(values).union(emptyMap), values); + assertSetContainsExactOrderedItems(emptySet.union(new Set(values)), values); + assertSetContainsExactOrderedItems(emptySet.union(new SetLike(values)), values); + assertSetContainsExactOrderedItems(emptySet.union(asMap(values)), values); + + // Two sets with the exact same values. + assertSetContainsExactOrderedItems(new Set(values).union(new Set(values)), values); + assertSetContainsExactOrderedItems(new Set(values).union(new SetLike(values)), values); + assertSetContainsExactOrderedItems(new Set(values).union(asMap(values)), values); + + // Union of the same set object. + let set = new Set(values); + assertSetContainsExactOrderedItems(set.union(set), values); +} + +// Check property accesses are in the correct order. +{ + let log = []; + + let sizeValue = 0; + + let {proxy: keysIter} = LoggingProxy({ + next() { + log.push("next()"); + return {done: true}; + } + }, log); + + let {proxy: setLike} = LoggingProxy({ + size: { + valueOf() { + log.push("valueOf()"); + return sizeValue; + } + }, + has() { + throw new Error("Unexpected call to |has| method"); + }, + keys() { + log.push("keys()"); + return keysIter; + }, + }, log); + + assertSetContainsExactOrderedItems(emptySet.union(setLike), []); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + "[[get]]", "has", + "[[get]]", "keys", + "keys()", + "[[get]]", "next", + "next()", + ]); +} + +// Check input validation. +{ + let log = []; + + const nonCallable = {}; + let sizeValue = 0; + + let {proxy: keysIter} = LoggingProxy({ + next: nonCallable, + }, log); + + let {proxy: setLike, obj: setLikeObj} = LoggingProxy({ + size: { + valueOf() { + log.push("valueOf()"); + return sizeValue; + } + }, + has() { + throw new Error("Unexpected call to |has| method"); + }, + keys() { + log.push("keys()"); + return keysIter; + }, + }, log); + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + "[[get]]", "has", + "[[get]]", "keys", + "keys()", + "[[get]]", "next", + ]); + + // Change |keys| to return a non-object value. + setLikeObj.keys = () => 123; + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + "[[get]]", "has", + "[[get]]", "keys", + ]); + + // Change |keys| to a non-callable value. + setLikeObj.keys = nonCallable; + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + "[[get]]", "has", + "[[get]]", "keys", + ]); + + // Change |has| to a non-callable value. + setLikeObj.has = nonCallable; + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + "[[get]]", "has", + ]); + + // Change |size| to NaN. + sizeValue = NaN; + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + ]); + + // Change |size| to undefined. + sizeValue = undefined; + + log.length = 0; + assertThrowsInstanceOf(() => emptySet.union(setLike), TypeError); + + assertEqArray(log, [ + "[[get]]", "size", + "valueOf()", + ]); +} + +// Doesn't accept Array as an input. +assertThrowsInstanceOf(() => emptySet.union([]), TypeError); + +// Works with Set subclasses. +{ + class MySet extends Set {} + + let myEmptySet = new MySet; + + assertSetContainsExactOrderedItems(emptySet.union(myEmptySet), []); + assertSetContainsExactOrderedItems(myEmptySet.union(myEmptySet), []); + assertSetContainsExactOrderedItems(myEmptySet.union(emptySet), []); +} + +// Doesn't access any properties on the this-value. +{ + let log = []; + + let {proxy: setProto} = LoggingProxy(Set.prototype, log); + + let set = new Set([1, 2, 3]); + Object.setPrototypeOf(set, setProto); + + assertSetContainsExactOrderedItems(Set.prototype.union.call(set, emptySet), [1, 2, 3]); + + assertEqArray(log, []); +} + +// Throws a TypeError when the this-value isn't a Set object. +for (let thisValue of [ + null, undefined, true, "", {}, new Map, new Proxy(new Set, {}), +]) { + assertThrowsInstanceOf(() => Set.prototype.union.call(thisValue, emptySet), TypeError); +} + +// Doesn't return the original Set object. +{ + let set = new Set([1]); + assertEq(set.union(emptySet) !== set, true); + assertEq(set.union(new Set([2])) !== set, true); +} + +// Test insertion order +{ + let set = new Set([1, 2]); + + // Case 1: Input is empty. + assertSetContainsExactOrderedItems(set.union(new Set([])), [1, 2]); + + // Case 2: Input has fewer elements. + assertSetContainsExactOrderedItems(set.union(new Set([3])), [1, 2, 3]); + + // Case 3: Input has same number of elements. + assertSetContainsExactOrderedItems(set.union(new Set([3, 4])), [1, 2, 3, 4]); + + // Case 4: Input has more elements. + assertSetContainsExactOrderedItems(set.union(new Set([3, 4, 5])), [1, 2, 3, 4, 5]); +} + +// Test that the input set is copied after accessing the |next| property of the keys iterator. +{ + let set = new Set([1, 2, 3]); + + let setLike = { + size: 0, + has() { + throw new Error("Unexpected call to |has| method"); + }, + keys() { + return { + get next() { + // Clear the set when getting the |next| method. + set.clear(); + + // And then add a single new key. + set.add(4); + + return function() { + return {done: true}; + }; + } + }; + }, + }; + + // The result should consist of the single, newly added key. + assertSetContainsExactOrderedItems(set.union(setLike), [4]); +} + +// Tests which modify any built-ins should appear last, because modifications may disable +// optimised code paths. + +// Doesn't call the built-in |Set.prototype.{has, keys, size}| functions. +const SetPrototypeHas = Object.getOwnPropertyDescriptor(Set.prototype, "has"); +const SetPrototypeKeys = Object.getOwnPropertyDescriptor(Set.prototype, "keys"); +const SetPrototypeSize = Object.getOwnPropertyDescriptor(Set.prototype, "size"); + +delete Set.prototype.has; +delete Set.prototype.keys; +delete Set.prototype.size; + +try { + let set = new Set([1, 2, 3]); + let other = new SetLike([1, 2, 3]); + assertSetContainsExactOrderedItems(set.union(other), [1, 2, 3]); +} finally { + Object.defineProperty(Set.prototype, "has", SetPrototypeHas); + Object.defineProperty(Set.prototype, "keys", SetPrototypeKeys); + Object.defineProperty(Set.prototype, "size", SetPrototypeSize); +} + +if (typeof reportCompare === "function") + reportCompare(true, true); |